"When used light and small, it's super precise and premium; in its big, fat, expressive italic form, it looks more bold and a bit weird," Tom explains. Overall the tone of voice is packed with wit and in-jokes, from its copywriting down to its new file name, .af - which apart from being on every file you export from the programme, is also used in myriad, tongue-in-cheek ways across merch, such as its "Sketchy.af" notebook.